Originally posted by Steve Zodiac
Mcgregor tires because he is cutting weight to below his actual weight class in a way most people don't. Most people cut 12 pounds; he's cutting a lot more. He is a bigger man fighting naturally much smaller men than him, this wasn't true of course in the Diaz bouts, where in the first he was overweight for him and had not done enough Cardio and as you said in the second Diaz did what Diaz does best ran a marathon, which is why it was so close. Diaz is a very good boxer for MMA, he may not look stylish but he is actually very good.
At featherweight he cuts a lot, but at lightweight he doesn't, I don't know if you're referencing Boxing or MMA, but in mma the average fighter cuts a lot more than 12 pounds. Most guys at the top of their respective divisions cut upwards of 25.